Given figure represents a pyramid of biomass in an aquatic ecosystem.
Identify A and B and select the correct answer.
and and
and and
is phytoplanktons and 
is zooplanktons. 
is zooplanktons and 
is phytoplanktons.
Text Solution
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B represents the Producers (Phytoplanktons): These have a lower standing crop biomass at any given time because they are consumed very quickly, even though they reproduce rapidly. This makes B the crop that supports the levels above it. A represents the Consumers (Zooplanktons/Fish): These have a higher standing crop biomass because they live longer and accumulate mass. This makes A the crop that is supported by the producers.
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